Bolt elongator

The utility model relates to a bolt elongator, including being provided with the screw rod of inner hexagonal hole spanner, with screw rod threaded connection's fixing sleeve in advance, be provided with in the outside of screw rod and support the cover, the main casing body is installed and is being supported cover and fixing sleeve's junction in advance, the main casing body, supports cover, screw rod and forms a spring mounting chamber in advance between the fixing sleeve, and the spring mounting is at the spring mounting intracavity, set up an oil pipe way that has the pump nozzle on the main casing body, fixing sleeve's in advance tip be provided with first ring gear, the outside of the inner hexagonal hole spanner on the screw rod is provided with the second ring gear, a first ring gear and an electric actuator interlock, second ring gear and the 2nd electric actuator interlock, an electric actuator and the 2nd electric actuator install on the main casing body. The utility modelhas the advantages that r